Coleopterological Notices, IV. 689 



Mexico (Guerrero). Mr. Baron. 



Allied to frontalis but distinguishable by its stouter form, more 

 polished integuments, much less prominent humeri and several other 

 characters. I take great pleasure in dedicating this species to Dr. 

 D. Sharp. 



Y. grossus n. sp. — Oblong, subcylindrical, broadly feebly convex above, 

 deep black, polislied, the elytra dull. Head coarsely, rather sparsely punc- 

 tate ; beak in the male straight, wider than thick, coarsely, densely, rugosely 

 punctate, feebly dilated and tumid at the antennae, thence feebly and evenly 

 narrowed to the apex, two-thirds as long as the prothorax; antennae inserted 

 distinctly beyond the middle, the scape rather long, thick, evenly and gradu- 

 ally claviform, attaining the eye, second funicular joint much longer than the 

 first, equal to the next two, four to six transversely subcuneate, club nearly 

 as long as the preceding four joints, the corneous portion extending on the 

 flat side to apical two-fifths. Prothorax about as long as wide, the apex con- 

 stricted, two-thirds as wide as the base ; sides broadly arcuate ; disk evenly 

 convex, very coarsely perforato-punctate, the punctures well separated above, 

 coalescent on the flanks. Elytra one-third wider than the prothorax and more 

 than twice as long, not quite twice as long as wide ; strial punctures deep, 

 coarse, contiguous, continuing large and distinct to the apex ; intervals toward 

 base two to three times as wide as the striae, coarsely, unevenly, sparsely 

 punctate, anterior tibiae broadly, feebly arcuate toward apex, having an in- 

 ternal series of small denticles. Length 11.5-14.0 mm. ; width 4.2-5.2 mm. 



Texas (El Paso) ; Arizona. Mr. G. W. Dunn. 



The largest species which I have seen and quite distinct from 

 either frontalis or sharpi. 



Cossonin^j. 



METOPOTOMA n. gen. 



The single species is an interesting addition to the anomalous 

 group of genera allied to G-ononotus. 



Body in form and convexity nearly as in Gononotus. Head short, sub- 

 globular, smooth and polished, deeply, transversely incised throughout just 

 behind the eyes, which are situated at the sides of the beak at base, rather 

 large, distinctly convex and composed of very large facets, which are flat 

 and not convex. Beak rather long, thick, parallel and arcuate, the an ten - 

 nal scrobes rapidly descending at first, becoming completely inferior, not 

 coalescent. .Antennae subcylindrical, long but thick, inserted at apical two- 

 fifths, the scape clavate, attaining the limits of the eye beneath, longer than 

 the apparent funicle, the latter consisting of six joints, the first scarcely more 

 robust, oval, the second obconical, subelongate, much longer than the first and 

 one-half longer than the third, three to six subequal, wider than long, paral- 



